Big Top Timmy is the 18th episode of Shaun the Sheep.
In the barn, The Flock is resting. Timmy then sees a light through the barn window and he starts to wander out the door. Timmy then sees the circus and starts wandering to the circus, at first he was stopped by Bitzer but successfully leaves on his second try. The next morning, Timmy's Mother notices Timmy is gone and Shaun tries to help. The Flock then comes to the circus and sees Timmy on the tightrope. Shaun tries to catch Timmy several ways while Shirley plays the drums. On the final attempt, Shaun catches Timmy. Meanwhile, The Farmer is wondering where the Flock is. The Flock launches themselves over to the barn. The Farmer finally sees them and thinks there are more flying sheep. The episode ends when the flock look at each other, thinking he's crazy.